blob: a7e10d827a8bd48703d1dfd216c6a6097eba95d7 [file] [log] [blame]
// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package binarylib
import (
// NewHTTPRoot returns an implementation of http.FileSystem that can be used
// to serve the content in the binary service.
func NewHTTPRoot(ctx *context.T, state *state) http.FileSystem {
return &httpRoot{ctx: ctx, state: state}
type httpRoot struct {
ctx *context.T
state *state
// TODO(caprita): Tie this in with DownloadUrl, to control which binaries
// are downloadable via url.
// Open implements http.FileSystem. It uses the multipart file implementation
// to wrap the content parts into one logical file.
func (r httpRoot) Open(name string) (http.File, error) {
name = strings.TrimPrefix(name, "/")
r.ctx.Infof("HTTP handler opening %s", name)
parts, err := getParts(r.ctx, r.state.dir(name))
if err != nil {
return nil, err
partFiles := make([]*os.File, len(parts))
for i, part := range parts {
if err := checksumExists(r.ctx, part); err != nil {
return nil, err
dataPath := filepath.Join(part, dataFileName)
var err error
if partFiles[i], err = os.Open(dataPath); err != nil {
r.ctx.Errorf("Open(%v) failed: %v", dataPath, err)
return nil, verror.New(ErrOperationFailed, nil, dataPath)
return multipart.NewFile(name, partFiles)